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#!/bin/bash -u

source gf_perf_config

if [ $# -le 0 -o $# -gt 2 ]
then
	echo "Usage : $0 <run directory>"
	exit 1
fi

rundir=$1
cmpdir=""

if [ $# -eq 2 ]
then
	cmpdir=$2
fi

function gen_cpu_data()
{
	time=0
	sum=0
	
	num_procs=`grep -w ^processor $SYSINFO | wc -l`
	echo `grep idle $MPSTAT_LOG | head -1 | awk '{print $NF}'` | grep -o idle
	idle_col_tweak=$?
	echo `grep CPU $MPSTAT_LOG | head -1 | awk '{print $3}'` | grep -o CPU > /dev/null
	cpu_col_tweak=$?
	for i in "all" 0 `seq $((num_procs-1))`
	do
	        egrep -v 'Linux|^$|idle' $MPSTAT_LOG | awk -v v1=$cpu_col_tweak -v v2=$idle_col_tweak '{print $(3-v1) " " $(NF-v2)}' | grep -w ^$i | cut -f 2 -d' '| sed 's/^/100-/g' | bc -l > cpu-$i;
	        cat -n cpu-$i > cpu-$i.new
	done
}

function plot_cpu_usage()
{
	mpstat_interval=5
        plot_info=pinfo.$$
        num_procs=`grep -w ^processor $SYSINFO | wc -l`
        ltype=2
	identity=$1
	
        for i in 0 `seq $((num_procs-1))`
        do
                echo -ne "\"cpu-$i.new\" using (\$1*$mpstat_interval):2 title 'cpu-$i' with lines lt $ltype lw 2,\\c" >> $plot_info
                ltype=$((ltype+1))
        done
        echo -ne "\"cpu-all.new\" using (\$1*$mpstat_interval):2 title 'cpu-all' with lines lt 1 lw 2" >> $plot_info

	gnuplot <<EOF
	set autoscale 
	set grid
	set title "CPU utilization : All CPUs ($identity)"
	set xlabel "Time"
	set ylabel "% CPU utilization"
	set yr [0:100]
	set terminal png nocrop size 1024,768
	set output "$CPU_PLOT_OUTPUT"
        plot `cat $plot_info`
EOF
        rm $plot_info
}

function gen_vm_data()
{
	egrep -v 'memory|free|^$' $VMSTAT_LOG  | awk '{print $4}' > vm_datafile
	totalmem=`grep -w ^MemTotal $SYSINFO | awk '{print $2}'`
	cat vm_datafile | sed "s/^/$totalmem-/g" | bc > memfile
	cat -n memfile > memfile.new
}

function plot_vm_usage()
{
	vmstat_interval=5
	total_mem=`grep -w ^MemTotal $SYSINFO | awk '{print $2}'`
	identity=$1
	
	gnuplot <<EOF
	set autoscale 
	set grid
	set title "Memory utilization ($identity)"
	set xlabel "Time"
	set ylabel "Memory utilization in bytes"
	set yr [0:$total_mem]
	set terminal png nocrop size 1024,768
	set output "$VM_PLOT_OUTPUT"
	plot  "memfile.new" using (\$1*$vmstat_interval):2 title 'memory-usage' with lines lt 2 lw 2
EOF
}

function gen_iostats()
{
        brick=$1
        dev=`ssh $brick "df -h $SERVER_EXPORT_DIR" | tail -1 | awk '{print $1}' | cut -f3 -d'/'`
	egrep -v 'Device|^$' $IOSTAT_LOG |grep -w ^$dev | awk '{print $10}' | cut -f1 -d'.' > io_await
	cat -n io_await > io_await.new
	egrep -v 'Device|^$' $IOSTAT_LOG |grep -w ^$dev | awk '{print $6}' | cut -f1 -d'.' > read_tput
	cat -n read_tput > read_tput.new
	egrep -v 'Device|^$' $IOSTAT_LOG |grep -w ^$dev | awk '{print $7}' | cut -f1 -d'.' > write_tput
	cat -n write_tput > write_tput.new
}

function plot_iostats()
{
	iostat_interval=5
	max_wait=$((`sort -n io_await | tail -1` + 50))
	max_read=$(((`sort -n read_tput | tail -1`) / 2 + 100))
	max_write=$(((`sort -n write_tput | tail -1`) / 2 + 100))
        max_io=$max_write
        if [ $max_read -gt $max_write ]
        then
                max_io=$max_read;
        fi
	identity=$1
	
	gnuplot <<EOF1
	set autoscale 
	set grid
	set title "IO Wait times ($identity)"
	set xlabel "Time in seconds"
	set ylabel "IO Wait times in milliseconds"
	set yr [0:$max_wait]
	set terminal png nocrop size 1024,768
	set output "$IO_TIMES_PLOT_OUTPUT"
	plot  "io_await.new" using (\$1*$iostat_interval):2 title 'IO wait times' with lines lt 3 lw 2
EOF1
	gnuplot <<EOF2
	set autoscale 
	set grid
	set title "Disk Read-Write throughput ($identity)"
	set xlabel "Time in seconds"
	set ylabel "Throughput in KB/sec"
	set yr [0:$max_io]
	set terminal png nocrop size 1024,768
	set output "$IO_TPUT_PLOT_OUTPUT"
	plot  "read_tput.new" using (\$1*$iostat_interval):(\$2/2) title 'Read throughput' with lines lt 4 lw 2,\
	      "write_tput.new" using (\$1*$iostat_interval):(\$2/2) title 'Write throughput' with lines lt 5 lw 2
EOF2
}

function gen_cmp_data()
{
	perflog_baseline=$1
	perflog_current=$2
	
	time=0
	for op in `cat ops`
	do
	        time=0;
	        for i in `grep -w ^$op $perflog_baseline | awk '{print $2}'| cut -f1 -d'.'`
	        do
	                time=$((time+$i))
	        done;
	        time=$((time/3)) # Average over three runs
	        echo $time >> btimes.$$
	done
	
	for op in `cat ops`
	do
	        time=0;
	        for i in `grep -w ^$op $perflog_current | awk '{print $2}'| cut -f1 -d'.'`
	        do
	                time=$((time+$i))
	        done;
	        time=$((time/3)) # Average over three runs
	        echo $time >> ctimes.$$
	done
	
	paste -d " " ops btimes.$$ ctimes.$$ > $CMP_DATAFILE
	rm btimes.$$ ctimes.$$
}

function plot_comparison()
{
	a=`cat $CMP_DATAFILE | awk '{print $2"\n"$3}' | sort -n | tail -1`
	yrange=`echo $a + $a/5 | bc`
	b=`wc -l $CMP_DATAFILE | awk '{print $1}'`
	xrange=`echo $b - 0.5 | bc` 
	
	gnuplot <<EOF
	reset
	set key at graph 0.15, 0.85 horizontal samplen 0.1
	set style data histogram
	set style histogram cluster gap 1
	set style fill solid border -1
	set boxwidth 0.8
	set xtic rotate by 90 scale 0
	unset ytics
	set y2tics rotate by 90
	set terminal png nocrop size 1024,768
	set xlabel ' '
	set size 0.6, 1
	set yrange [0:$yrange]; set xrange [-0.5:$xrange]
	set y2label '$XLABEL' offset -2
	set label 1 '$YLABEL' at graph 0.5, -0.4 centre rotate by 180
	set label 2 '$LEGEND_A' at graph 0.05, 0.85 left rotate by 90
	set label 3 '$LEGEND_B' at graph 0.12, 0.85 left rotate by 90
	set label 4 '$PLOT_TITLE' at graph -0.01, 0.5 center rotate by 90
	set output "tmp.$$.png"
	p '$CMP_DATAFILE' u 2 title ' ', '' u 3 title ' ', '' u 0:(0):xticlabel(1) w l title ''
EOF
        convert tmp.$$.png -rotate 90 $CMP_PLOT_OUTPUT
        rm tmp.$$.png
}

function gen_intr_csw_stats()
{
	egrep -v 'memory|free|^$' $VMSTAT_LOG | awk '{print $11}' > intrstat
	cat -n intrstat > intrstat.new
	egrep -v 'memory|free|^$' $VMSTAT_LOG | awk '{print $12}' > cswstat
	cat -n cswstat > cswstat.new
}

function plot_intr_csw_stats()
{
	vmstat_interval=5
	max_intr=$((`sort -n intrstat | tail -1` + 100))
	max_csw=$((`sort -n cswstat | tail -1` + 100))
        max_val=$max_csw
        if [ $max_intr -gt $max_csw ]
        then
                max_val=$max_intr;
        fi
	identity=$1
	
	gnuplot <<EOF
	set autoscale 
	set grid
	set title "Interrupts and context switches ($identity)"
	set xlabel "Time in seconds"
	set ylabel "Interrupts/Context Switches"
	set yr [0:$max_val]
	set terminal png nocrop size 1024,768
	set output "$INTR_CSW_PLOT_OUTPUT"
	plot  "intrstat.new" using (\$1*$vmstat_interval):2 title 'Interrupts' with lines lt 4 lw 2,\
	      "cswstat.new" using (\$1*$vmstat_interval):2 title 'Context Switches' with lines lt 5 lw 2
EOF
}

function gen_netstats()
{
	ip_addr=$1
        dev=`ssh $ip_addr ifconfig | grep -B1 $ip_addr | head -1 | cut -f1 -d' '`
        egrep -v 'IFACE|^$' $SAR_NETSTAT_LOG |grep -w $dev | awk '{print $3}' | cut -f1 -d'.' > rpkts
        cat -n rpkts > rpkts.new
        egrep -v 'IFACE|^$' $SAR_NETSTAT_LOG |grep -w $dev | awk '{print $4}' | cut -f1 -d'.' > wpkts
        cat -n wpkts > wpkts.new
        egrep -v 'IFACE|^$' $SAR_NETSTAT_LOG |grep -w $dev | awk '{print $5}' | cut -f1 -d'.' > rkbytes
        cat -n rkbytes > rkbytes.new
        egrep -v 'IFACE|^$' $SAR_NETSTAT_LOG |grep -w $dev | awk '{print $6}' | cut -f1 -d'.' > wkbytes
        cat -n wkbytes > wkbytes.new
}

function plot_netstats()
{
        sar_netstat_interval=5
        max_read_pkts=$((`sort -n rpkts | tail -1` + 50))
        max_write_pkts=$((`sort -n wpkts | tail -1` + 50))
        max_read_kbytes=$(((`sort -n rkbytes | tail -1`)/1024 + 100))
        max_write_kbytes=$(((`sort -n wkbytes | tail -1`)/1024 + 100))

        max_pkts=$max_write_pkts
        if [ $max_read_pkts -gt $max_write_pkts ]
        then   
                max_pkts=$max_read_pkts;
        fi

        max_kbytes=$max_write_kbytes
        if [ $max_read_kbytes -gt $max_write_kbytes ]
        then   
                max_kbytes=$max_read_kbytes;
        fi
        identity=$1

        gnuplot <<EOF1
        set autoscale
        set grid
        set title "Network statistics - Packet Read/Write ($identity)"
        set xlabel "Time in seconds"
        set ylabel "Number of Packets"
        set yr [0:$max_pkts]
        set terminal png nocrop size 1024,768
        set output "$NET_PKTS_PLOT_OUTPUT"
        plot  "rpkts.new" using (\$1*$sar_netstat_interval):2 title 'Read Packets' with lines lt 3 lw 2,\
              "wpkts.new" using (\$1*$sar_netstat_interval):2 title 'Write Packets' with lines lt 4 lw 2
EOF1
        gnuplot <<EOF2
        set autoscale
        set grid
        set title "Network Read-Write throughput ($identity)"
        set xlabel "Time in seconds"
        set ylabel "Throughput in KB/sec"
        set yr [0:$max_kbytes]
        set terminal png nocrop size 1024,768
        set output "$NET_TPUT_PLOT_OUTPUT"
        plot  "rkbytes.new" using (\$1*$sar_netstat_interval):(\$2/1024) title 'Read throughput' with lines lt 3 lw 2,\
              "wkbytes.new" using (\$1*$sar_netstat_interval):(\$2/1024) title 'Write throughput' with lines lt 4 lw 2
EOF2
}

function analyse_plot_data()
{
	identity=$1

	if [ $identity != "client" ]
	then
        	brick=$2
	fi
	# Generate CPU data
	gen_cpu_data
	# plot CPU data
	plot_cpu_usage $identity

	# Generate VM data
	gen_vm_data
	# plot VM data
	plot_vm_usage $identity

	if [ $identity != "client" ]
	then
		# Generate io-times and io-throughput data
		# This makes sense only for the bricks since the client is not involved in disk IO
		gen_iostats $brick
		# plot io-times and io-throughput data
		plot_iostats $identity
	fi

        # Generate interrupt and context switch data
        gen_intr_csw_stats
        # plot interrupt and context switch data
        plot_intr_csw_stats $identity

	# Generate network packet statistics and throughput data
	if [ $identity != "client" ]
	then
		gen_netstats $brick
	else
		gen_netstats $CLIENT_IP_ADDR
	fi
	# Generate network packet statistics and throughput data
	plot_netstats $identity

	# cleanup tmp files
	rm vm_datafile memfile*
	rm cpu-*
	if [ $identity != "client" ]
	then
		rm io_await* read_tput* write_tput*
	fi
	rm cswstat* intrstat*
	rm rpkts* wpkts* rkbytes* wkbytes*
}

function analyse_client_data()
{
	MPSTAT_LOG=$rundir/client/mpstat_log
	VMSTAT_LOG=$rundir/client/vmstat_log
	IOSTAT_LOG=$rundir/client/iostat_log
	SAR_NETSTAT_LOG=$rundir/client/sar_netstat_log
	SYSINFO=$rundir/client/sysinfo
	PERFLOG=$rundir/client/perf-test.log
	CPU_PLOT_OUTPUT=$rundir/client/cpu.png
	VM_PLOT_OUTPUT=$rundir/client/vm.png
        IO_TIMES_PLOT_OUTPUT=$rundir/client/io_times.png
        IO_TPUT_PLOT_OUTPUT=$rundir/client/io_tput.png
        INTR_CSW_PLOT_OUTPUT=$rundir/client/intr_csw.png
	NET_PKTS_PLOT_OUTPUT=$rundir/client/net-pkts.png
	NET_TPUT_PLOT_OUTPUT=$rundir/client/net-tput.png
	identity="client"
	analyse_plot_data $identity
}

function analyse_brick_data()
{
	ind=0
	for b in $BRICK_IP_ADDRS
	do
		ind=$((ind+1))
		MPSTAT_LOG=$rundir/brick$ind*mpstat-log
		VMSTAT_LOG=$rundir/brick$ind*vmstat-log
		IOSTAT_LOG=$rundir/brick$ind*iostat-log
		SAR_NETSTAT_LOG=$rundir/brick$ind-*sar_netstat-log
		SYSINFO=$rundir/brick$ind*sysinfo-log
		PERFLOG=$rundir/client/perf-test.log
		CPU_PLOT_OUTPUT=$rundir/brick$ind-cpu.png
		VM_PLOT_OUTPUT=$rundir/brick$ind-vm.png
                IO_TIMES_PLOT_OUTPUT=$rundir/brick$ind-io_times.png
                IO_TPUT_PLOT_OUTPUT=$rundir/brick$ind-io_tput.png
                INTR_CSW_PLOT_OUTPUT=$rundir/brick$ind-intr_csw.png
		NET_PKTS_PLOT_OUTPUT=$rundir/brick$ind-net-pkts.png
		NET_TPUT_PLOT_OUTPUT=$rundir/brick$ind-net-tput.png

		identity="brick$ind"
		analyse_plot_data $identity $b
	done
}

function do_comparison()
{
	# Generate comparison data
	gen_cmp_data $1 $2

	# plot perf comparison
	plot_comparison
}

cp ops $LOCAL_LOG_REPO
cd $LOCAL_LOG_REPO
analyse_client_data
analyse_brick_data
rm ops

if [ "$cmpdir" != "" ]
then
	CMP_PLOT_OUTPUT=$cmpdir-$rundir-cmp.png
	CMP_DATAFILE=$rundir/client/cmp-with-$cmpdir-data.dat

	XLABEL="Time in seconds"
	YLABEL="Operations"
	LEGEND_A="$cmpdir"
	LEGEND_B="$rundir"
	PLOT_TITLE="Performance comparison - $cmpdir vs $rundir"
	do_comparison $cmpdir/client/perf-test.log $rundir/client/perf-test.log
fi

# Create tarball of the plots
echo "Creating plots.tar..."
cd $rundir
tar cf plots.tar *.png client/*.png